maths. problem
回答 (1)
2007-05-27 12:09 am
✔ 最佳答案
x =√(a+1) - √ax+1/x
=[√(a+1) - √a]+1/[√(a+1) - √a]
=[√(a+1) - √a]+[√(a+1) +√a]/[√(a+1) - √a][√(a+1) + √a]
=[√(a+1) - √a]+[√(a+1) +√a]
=2√(a+1)
收錄日期: 2021-04-25 16:53:27
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070526000051KK02489